North America Native Plant

Sudetic Lousewort

Botanical name: Pedicularis sudetica interioides

USDA symbol: PESUI

Life cycle: perennial

Habit: forb

Native status: Native to Alaska âš˜ Native to Canada  

Sudetic Lousewort: A Mysterious Northern Native Worth Knowing Meet the sudetic lousewort (Pedicularis sudetica interioides), a perennial wildflower that calls the far northern reaches of North America home. While this plant might not be on every gardener’s wish list, it represents the hardy, resilient spirit of our northern ecosystems and ...

Sudetic Lousewort: A Mysterious Northern Native Worth Knowing

Meet the sudetic lousewort (Pedicularis sudetica interioides), a perennial wildflower that calls the far northern reaches of North America home. While this plant might not be on every gardener’s wish list, it represents the hardy, resilient spirit of our northern ecosystems and deserves a closer look from native plant enthusiasts.

What Exactly Is Sudetic Lousewort?

Sudetic lousewort is a herbaceous perennial that belongs to the fascinating lousewort family. Despite its somewhat off-putting common name (don’t worry, it has nothing to do with actual lice!), this plant is a true forb – a non-woody flowering plant that dies back to the ground each winter and returns fresh each spring.

As a native species, sudetic lousewort has evolved specifically to thrive in the challenging conditions of Canada’s vast wilderness and Alaska’s rugged landscapes. It’s perfectly adapted to handle whatever Mother Nature throws its way in these northern regions.

Where Does It Grow Wild?

This hardy native has quite an impressive range across the northern portions of North America. You’ll find sudetic lousewort growing naturally in:

  • Alaska
  • Alberta
  • British Columbia
  • Manitoba
  • Ontario
  • Quebec
  • Yukon
  • Northwest Territories
  • Nunavut

That’s a lot of territory! This wide distribution tells us that sudetic lousewort is remarkably adaptable to various northern conditions, from boreal forests to tundra landscapes.

Should You Consider Growing It?

Here’s where things get a bit tricky. While sudetic lousewort is undoubtedly a legitimate native plant with an impressive northern pedigree, detailed cultivation information is surprisingly scarce. This isn’t necessarily a bad thing – it just means this plant is more of a wildflower specialist’s interest than your average garden center variety.

If you’re gardening in the northern regions where this plant naturally occurs, and you’re passionate about growing truly local natives, sudetic lousewort could be an intriguing addition to a wild or naturalized garden area. However, you’ll need to be prepared for some experimentation and patience.

The Challenge of Growing Sudetic Lousewort

The biggest hurdle with sudetic lousewort is the lack of readily available cultivation information. Unlike popular native plants that have been extensively studied and grown by gardeners, this species remains something of a mystery in the horticultural world.

What we do know is that it’s adapted to northern climates, so it’s likely quite cold-hardy. Being a perennial forb, it probably prefers conditions similar to other northern wildflowers – potentially including well-draining soils and exposure to natural seasonal cycles.

Finding Seeds or Plants

Don’t expect to find sudetic lousewort at your local garden center. This plant is more likely to be available through specialized native plant societies, seed exchanges, or botanical gardens that focus on northern flora. If you’re seriously interested in growing it, connecting with native plant groups in Alaska or northern Canada might be your best bet.

Alternative Northern Natives to Consider

If sudetic lousewort proves too elusive or challenging, consider these other northern native options that are better documented and more available:

  • Wild bergamot (Monarda fistulosa)
  • Purple prairie clover (Dalea purpurea)
  • Wild lupine (Lupinus perennis)
  • Nodding onion (Allium cernuum)

The Bottom Line

Sudetic lousewort represents the fascinating world of specialized native plants that thrive in specific ecosystems. While it might not be the easiest plant to grow or find, it serves as a reminder of the incredible diversity of native flora across North America.

For most gardeners, sudetic lousewort is more of a nice to know about plant than a must have for the garden. But for dedicated native plant enthusiasts in the far north, it could be a rewarding challenge and a way to connect with the unique flora of their region.

Remember, successful native gardening is often about working with plants that are naturally suited to your specific area. If you’re in sudetic lousewort’s native range and interested in truly local plants, it might be worth the effort to track down. Otherwise, there are plenty of other wonderful native options that are better understood and more readily available for your gardening adventures.

Sudetic Lousewort

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Pedicularis L. - lousewort

Species

Pedicularis sudetica Willd. - sudetic lousewort

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA